Book cover boards



Titi. 1.

May 9, 1967 E. K.MUL1 EN ET AL 3,38

BOOK COVER BOARDS original-Filed Feb. l?, 1965 3 sheets-sheet 1 V 4f :n\1 v BY W 5 Sheets-Sheet 2 CARTE/ INVENTORS fg. Maui/V May 9, 1967 E, K, MULLEN ET AL BOOK COVER BOARDS Original Filed Feb. 17, 1965 May 9, i967 E. K. MULLEN ET AL g BOOK COVER BOARDS Original Filed Feb. l7, 1965 5 Sheets-5heet 3 INVENTORS ,FOM/MRD A. /WUE/V L FEM/OOD C'. CARTER like.

3,318,618 BOOK COVER BOARDS Edward K. Mullen and Leewood C. Carter, Westfield,

NJ., assignors to Book Covers Incorporated, Newark, NJ., a corporation of New Jersey 1 Original application Feb. 17, 1965. Ser. No. 433,346.

Divided and this application Apr. 4, 1966, Ser. No. 547,6ss

Claims. (Cl. 281-29) This application is a division of application Ser. No. 433,346, led Feb. 17, 1965, now abandoned.

This invention relates to book cover boards, loose leaf cover boards, album or catalogue cover boards and the Particularly, this invention relates to a book cover board having leaf boards and a spine board of multilayer construction. More particularly, this invention relates to a book cover board having leaf boards hinged in spaced relation to a spine board.

It is an object vof this invention to provide a book cover board which can be conveniently constructed.

It is another object of'this invention to provide la book cover board having a pair of double thickness leaf boards `hingedly connected together.

ynature and substance, will be more clearly perceived and fully understood by referring to the following description and claims taken in connection with the accompanying drawings in which:

FIG. 1 is a plan view of the assembly machine which assembles the book cover board;

FIG. 2 is a cross-sectional view taken at line 2 2 in FIG. l;

FIG. 3 is a cross-sectional view taken at line 3-3 in FIG. 2;

FIG. 4 is a cross-sectional view taken at line 4 4 in FIG. 2;

FIG. 5 is a perspective view of the book cover board after leaving the assembly machine shown in FIG. l;

FIG. 6 is a perspective view of the book cover board of FIG. 5 enveloped in a plastic coating; and

FIGS. 7 to 9 are perspective views of other embodiments of this invention.

Referring to the drawings, particularly FIGS. 1 through 5, the assembly machine of the invention comprises two side plate assemblies and 21 which are maintained in spaced parallel relation by means of a plurality of cross bars or cross ties (not shown) and which are suitably supported above the level of the floor, for example by a plurality of leg members. A hinge material shaft 22 is rotatably mounted in the side plate assemblies 20 and 21 at the left-hand end thereof as viewed in FIGS. l and 2 and a hinge material roll 23 is wrapped thereon. The hinge material 24 which is in strip form and relatively thin compared to the leaf boards is made of a material to which vinyl film can be dielectrically heat-sealed and which is suitable for joining the leaf and spine boards of a cover board structure, for example, polyvinylacetate coated paper, vinyl impregnated cloth (plain open weave cloth through which the vinyl may fuse to itself), pure UnitedStates Patent O ice vinyl, or indeed, any flexible material to which the leaf boards can be adhesively secured. l

A pair of leaf board shafts 25 are rotatably mounted'in the side plate assemblies 20 :and 21 to the right of the hinge material roll 23, one above and one below the plane of the hinge material roll 23. Each leaf -board shaft `25 has a pair of spaced apart leaf board rolls 26, 27 wrapped thereon. The leaf board material 28, 29 which is in strip form and of a thickness usually in the range of from 0 .030 inch to 0.060 inch, leaving it sufficient llexibility for winding, is made of material suitable for leaves of a book cover. The leaf board rolls 26, 27 are spaced from each other by a distance slightly greater than the width of the spine to be incorporated in the book lcover board.

The leaf board strips 28, 29 of the top leaf board rolls 26 are passed over a suitable idler roll 30 which is rotatably mounted inthe side plate assemblies 20, 21 and moved over a suitable glue roll 31. As these leaf board strips 28, 29 move over the glue roll 31, a sufficient amount of glue is adhered to the underside of each leaf board strip 28, 29 from a glue reservoir 32 by means of the glue roll 31. The glue containing leaf board strips 28, 29 are then directed between a pair of press rolls 33.

The leaf board strips 28, 29 of the bottom leaf board rolls 26 a-re passed around a suitable idler roll 34 which is rotatably mounted in the side plate assemblies 20, 21 and moved past a suitable glue roll 35. As the leaf board strips 28, 29 move past the lglue roll 3S, a suliicient amount of glue is adhered to the top side of each leaf board strip 28, 29 from a glue reservoir 36 by means of a glue transfer roll 37 and glue roll 3S. The glue containing leaf board strips 28, 29 are then directed between the pair of press rolls 33.

The hinge material strip 24 is directed from the hinge material roll 23 to the press rolls 33 where it is sandwiched between the pairs of leaf board strips 28, 29, re-

- spectively, as shown in FIG. 3. The press rolls 33 are rotatably mounted to the right of the leaf board rolls in the side plate assemblies 20, 21 and are spaced apart vertically. The vertical spacing between the press rolls 33 is slightly less than the combined thickness of the hinge material strip 24 and .a pair of leaf board strips 28 or 29 so that `these strips pass between the press rolls, a sufficient force is applied thereto to press the leaf boa-rd -strips together into bonded relationship with the hinge material 23 depressed into the respective leaf board strips so as to form a single adhered unit.

A pair of spine board shafts 38 are rotatably mounted in the side plate assemblies Ztl and 21 to the right of the press rolls 33, one above and one below the plane of the hinge material st-rip 23. Each spine board shaft 38 has a spine board roll 39 wrapped thereon. The spine board material 40 which is in strip form and of the same thickness as the leaf board is made of any material, for example plastic, light-weight steel, libre board, or any other suitable material. Each spine board roll 39 is positioned between a coplanar pair of leaf board strips 28, 29.

The spine board strip 40 of the top spine board roll 39 is passed over a suitable idler .roller 41 which is rotatably mounted in the side plate assemblies 20, 21 and moved over a suitable glue roll 42. As the spine board st-rip 40 moves over the glue roll 42, a sufficient amount of glue is adhered to the underside of the spine board strip 40 from a glue reservoir 43 by means of the glue roll 42. The glue containing spine board strip 40 is then directed between a pair of press rolls 44.

The spine board strip 40 of the bottom spine board roll 39 is passed over a suitable idler roller 45 which is rotatably mounted in the side plate assemblies 20, 21 and moved past a glue roll 46. As the spine board strip 40 moves past the glue 4roll 46, a suicient amount of glue is adhered to the topside of the spine board 40 from a glue reservoir of leaf boards.

47 by means of a glue transfer roll 48 and glue roll 46. The glue containing spine board strip 40 is then directed Ibetween the pairs of press rolls 44.

The previously formed leaf board and hinge material Vunit is also directed between the press 4rolls 44 where the glue containing spine board strips 40 .are adhered to the top and bottom surfaces of the hinge material strip 24 in the area between lthe leaf board strips 28 and 29, as shown in FIG. 4. The press rolls 44 are spaced apart vertically so that a sufficient force can be applied to the spine board strips 40 'to insure their adherence to the hinge material strip .24 and to compress them suiciently in thickness to provide a total uniform thickness of spine boards and hinge material equal to the thickness of the bonded pairs The spine board strips 40 thus become part of the leaf board and hinge material unit to form a book cover unit 49 of uniform thickness.

The book cover unit 49 then moves away from the press rolls 44 to a cutting block 50 above which a cut-off knife 51 is positioned. After a predetermined length of the book cover unit 49 passes by the cut-off knife 51, the cutoif knife `51 drops down to sever the predetermined length from theA remainder of the unit 49 so as to form a book cover board S2. The severed book cover board 52 leaves the cutting block 50 to be picked up by a discharge conveyer belt 53' which is mounted on rotating conveyer rollers 54 which are rotatably mounted in the side plate assemblies 20, 21. The conveyer belt 53 moves at a slightly faster rate of speed than the book cover unit 49 so that a space can be maintained between successively severed book cover boards. The book cover board is then delivered by the discharge conveyer belt 53 to a receiving bin where it is stacked upon previously formed book cover boards.

Referring next toV FIG. 6, the book cover boards 52 may be fed to a jacketing or casemaking machine and therein be provided with a jacket 6 of plastic material, specifically a vinyl material. However, many materials can be used to form a 'jacket for the book cover boards.

VFor example, a cloth and/or paper jacket which are well known in the art may be glued lall over to the book cover Vcomprised of pairs of leaf boards 61 and-62 hinged together by khinge material 63 in a manner as set forth above. However, in place of a pair of spine boards, a second strip of hinge material 64 is adhered to the bottom side of the leaf board and hinge material unit below the hinge material 63. This second strip of hinge material V64 is adhered to theV bottom leaf boards 61 and 62 in a manner similar to the manner in which the bottom spineA board is adhered in the book cover board 52 described above; that is, a roll of hinge material is rotatably mounted in the side plate assemblies to the right of the leaf board rolls, the hinge material strip is then moved over a glue roll and reservoir assembly so that the glue may be applied to the top side of the hinge material strip and the strip is passed between the press rolls where it is adhered to and pressed into the bottoms of the bottom pair of spaced apart leaf boards.

The book cover board 60 Vof FIG. 7 has particular values in the construction of conventional trade Vbooks and in the elimination of lthe glueing-olf of books and the useV of super or crash in building strength into the joints between book and cover. close weave cloth is used =as the hinge material between the plies of the leaf boards and a paper or saturated paper is used as the second hinge material on the outside surface of the leaf boards, Further, the two hinge materials Vcan be cut out from the top and bottom of the book cover By way of example, a

board between the leaf boards inwardly about one-half inch during the assembly process of the book cover boar-d. This would allow cover material to be brought around the edges of the book cover board without catching the hinge material, thus permitting the book cover'board to be covered by any material in a conventional case maker.

Referring next to FIG. 8, a book cover board 65 which is a modification similar to the book cover board 60 of FIG. 7, is constructed in a similar manner so that the two hinges are placed on the same side of the leaf boards. The book cover board 65 is comprised of a pair of spaced apart two-ply leaf boards 66 which are hinged together by a first strip of hinge material`i67 and a second strip Y of hinge material 68. The book cover board 65Y is constructed in a manner similar to the book cover board 60 by an assembly machine similar to t-he assembly machine of FIGS. 1 and 2, that is, the strips of hinge material are adhered to the bottom surfaces of the leaf boards in continuous fashion by suitable material rolls, glue rolls and press rolls. The adhered strips are subsequently formed with a slit about one-half inch from the longitudinal ends between the leaf boards 66 so that three separate and distinct hinge sections 69, 70, 71'are formed.

This allows a cover material to be brought Varound theV edges of the book cover board to the extent of the outside hinge sections 69, 71 without interfering with the hinge section of the inside or iirst hinge material strip'67. Thus, the hinge 70 may be securedin the usual manner to thebackbone of a book with the attendant characteristic of allowing the book with theV hinge section 70.to move away from the cover material upon opening of such a book and cover board assembly. Alternatively, the strips of hinge material may be suitably cut out between the leaf boards nearthe longitudinal ends so as to extend inwardly of the leaf board edges and to achieve the same result of not permitting the cover material to interfere with the inside or r-st strip 67 of hinge material. n

The first strip of hingematerial 67 is preferably made of close woven cloth and is adhered to the leaf boar-ds 66 near the adjacent edges thereof. The outside or second ,strip of hinge material 68 is preferably made of paperV or latex saturated paper and is adheredtothe leaf boardsf` n y, 66 at an area remote from the adjacent leaf board'edge's: that is, only the edge portions of thesecond strip 68 are provided with adhesion means for adhering the strip 682 to the leaf boards l66 -at a spaced distance from the edges,Y

of the first strip67 thereby precluding any of the adhesion means from passing to the second strip 68. The paper hinge material 68 is t-hus spaced from the close woven v cloth hinge material 67, by a slight space. When a suit- Y able cover material isplaced around the bottom and top edges of the book coverV board 65 and a book is suitablyY adhered to the close woven cloth hinge material 67, adhering material will not pass through the close woven cloth hingematerial 67 onto the paper hinge material 68 and cover material.

the cover material, a substantially strong joint is made.

Addition-ally, where the book cover board is subjected to a casemaking process wherein a cloth or paper, either pre-printed or subsequently stamped, is wrapped around and glued to the cover board to form the outer covering of the book as ordinarily used the paper hinge 68 is nonporous. Thus, the glue adhering the cover material to the Vcover board structure will not pass'through t-he hinge ering thereby effecting a strong binding as well as facilitat Y ing opening of the book.

Further, since the closeV woven-cloth is Y adhered to the side of the book cover board covered by Referring neXt to FIG. 9, a book cover board 72 which is a further modification similar to the book cover board of FIG. 7 is constructed by an assembly machine similar to the assembly machine of FIGS. 1 and 2. The book cover board 72 is assembled in a suitable manner whereby the outside hinge material 73 which is preferably kraft paper, is fed from a suitable roll over a glue roll and adhered to and pressed into the two-ply leaf boards 74 and the two-ply spine board 75. By modifying the assembly machine of FIGS. 1 and 2 with another set of press rolls, the inside hinge material 76 which may be colored canvas, colored paper or any other similar co1- ored fabric is similarly fed, adhered to and pressed into the two-ply leaf boards 74 and two-ply spine board 75.

This book cover board 72 provides a reinforcing effect by use of the kraft paper on the outside of the book cover board structure as well yas the very desirable characteristic to the loose leaf manufacturer of having his inside hinge material 76 already in place.

While the invention is thus described, it is not wished that it be limited to the precise details described, as changes may be readily made within the scope of the claims without departing from the spirit of the invention.

What is claimed is:

1. A cover board comprising a first pair of leaf boards, a second pair of leaf boards disposed in spaced relation to said first pair of leaf boards, and a pair of hinge material strips adhered to said first pair of leaf boards and said second pair of leaf boards, one of said hinge material strips being adhered to a surface of each of said first and second pairs of leaf boards yand the other of said hinge material strips being wider than said one hinge material strip and overlying .said one hinge material strip in spaced relation and being adhered only to said surface of each of said leaf boards.

2. A cover board according to claim 1 wherein said one strip is a close woven cloth and said other strip is paper.

3. A cover board as set forth in claim 1 wherein each of said -hinge material strips has three longitudinally arranged hinge segments between said leaf board portions whereby a cover material can be folded over the edges of the cover board without interfering with subsequent movement of the interior hinge segment of said one hinge material strip.

4. A cover board as set forth in claim 1 wherein said one strip is a close woven cloth and said other strip is latex saturated paper.

5. A cover board as set forth in claim .1 wherein said one strip is a close Woven cloth and said other strip is non-porous paper.

References Cited by the Examiner UNITED STATES PATENTS 1,341,575 5/192() vMyers 281--29 X 1,908,109 5/1933 Bolton 281-36 1,991,608 2/1935 lFrazier 281-429 2,339,586 1/1944 Roberts 281-29 3,145,033 8/1964 Caddoo 281--29 3,206,226 9/1-965 Boyle 281-29 LAWRENCE CHARLES, Primary Examiner. 

1. A COVER BOARD COMPRISING A FIRST PAIR OF LEAF BOARDS, A SECOND PAIR OF LEAF BOARDS, AND A PAIR OF HINGE TO SAID FIRST PAIR OF LEAF BOARDS, AND A PAIR OF HINGE MATERIAL STRIPS ADHERED TO SAID FIRST PAIR OF LEAF BOARDS AND SAID SECOND PAIR OF LEAF BOARDS, ONE OF SAID HINGE MATERIAL STRIPS BEING ADHERED TO A SURFACE OF EACH OF SAID FIRST AND SECOND PAIRS OF LEAF BOARDS AND THE OTHER OF SAID HINGE MATERIAL AND OVERLYING SAID ONE HINGE MATERIAL STRIP MATERIAL STRIP AND OVERLYING SAID ONE HINGE MATERIAL STRIP IN SPACED RELATION AND BEING ADHERED ONLY TO SAID SURFACE OF EACH OF SAID LEAF BOARDS. 